Lay down, maybe put some drone music on, light a candle or two and try to picture a two-dimensional, million-sided shape with equal angles and sides, otherwise known as a “megagon.” Unless you’re gifted with superhuman abilities, or you’re under the influence of some really good peyote, you probably can’t visualize a significant difference between this somewhat overachieving polygon and a circle. One possibility is that you end up thinking of a circle with a strange, implicit quality, which neither of us can visualize to any level of determinacy, but we both know is there. As it stands, the difference between a regular megagon and a perfect circle is so fine that even if we were able to look at one the size of the earth, we would still have a pretty difficult time telling them apart.